Four-lepton production at hadron colliders: aMC@NLO predictions with theoretical uncertainties

被引：85
|
作者：
Frederix, Rikkert [1 ]
Frixione, Stefano [2 ,3 ]
Hirschi, Valentin [3 ]
Maltoni, Fabio [4 ]
Pittau, Roberto [5 ,6 ]
Torrielli, Paolo [3 ]
机构：
[1] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland
[2] CERN, TH Unit, PH Dept, CH-1211 Geneva 23, Switzerland
[3] Ecole Polytech Fed Lausanne, ITPP, CH-1015 Lausanne, Switzerland
[4] Catholic Univ Louvain, Ctr Cosmol Particle Phys & Phenomenol CP3, B-1348 Louvain, Belgium
[5] Univ Granada, Dept Fis Teor & Cosmos, Granada, Spain
[6] Univ Granada, CAFPE, Granada, Spain
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 02期
基金：
美国国家科学基金会; 瑞士国家科学基金会;
关键词：
NLO Computations; Hadronic Colliders; QCD; Standard Model; BOSON PAIR PRODUCTION; ZZ; O(ALPHA(S)); AMPLITUDES;
D O I：
10.1007/JHEP02(2012)099
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We use aMC@NLO to study the production of four charged leptons at the LHC, performing parton showers with both HERWIG and PYTHIA6. Our underlying matrix element calculation features the full next-to-leading order O(alpha(S)) result and the O(alpha(2)(S)) contribution of the gg channel, and it includes all off-shell, spin-correlation, virtual-photon-exchange, and interference effects. We present several key distributions together with the corresponding theoretical uncertainties. These are obtained through a process-independent technique that allows aMC@NLO to compute scale and PDF uncertainties in a fully automated way and at no extra CPU-time cost.
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页数：26
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